Featuring an outer-facing water jet and a rotary arm, impact sprinklers are designed with ease of use in mind and only require the force of water to operate. Once connected to a water source, water pressure builds in the hosepipe to emit a water jet from the sprinkler head. This jet will hit the rotary arm, an action that rotates the sprinkler head and scatters the water in a neat arc, ensuring an even spray.
As the arm hits the water stream, it returns to its original position, before repeatedly interrupting the jet of water. This back and forth spring-action creates the characteristic clicking noise and ensures repetitive, consistent watering for your lawn.